New Reporting Procedures Based on Long-Term Method Detection Levels and Some Considerations for Interpretation of Water-Quality Data Provided by the U.S. Geological Survey National Water Quality Laboratory, Open-File Report 99-193.

The proceedings of the technical meeting, "Animal Feeding Operations: Effects
on Hydrologic Resources and the Environment," held in Fort Collins, CO, Aug. 30 - Sept. 1, 1999, are online as USGS Open-File Report 00-204 on the Proceedings page of the AFO Web site.